Still hot…. | FerrariChat

Still hot….

Discussion in '456/550/575' started by Auraraptor, Aug 16, 2024.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, Skimlinks, and others.

  1. Auraraptor

    Auraraptor F1 World Champ
    Lifetime Rossa Owner

    Sep 25, 2002
    13,969
    MO
    Full Name:
    Omar
    #1 Auraraptor, Aug 16, 2024
    Last edited: Aug 16, 2024
    90-95 deg / high humidity day in Missouri in city driving still running the water high. Despite rebuilding/recoring the radiator. Frustrating cooling system indeed
    Image Unavailable, Please Login
     
  2. Timmo

    Timmo Formula Junior

    Aug 26, 2017
    680
    Continental Europe
    Assuming you have Nick's harness already, has the water pump ever been replaced?
     
    Auraraptor and Mirek like this.
  3. Auraraptor

    Auraraptor F1 World Champ
    Lifetime Rossa Owner

    Sep 25, 2002
    13,969
    MO
    Full Name:
    Omar
    Yes with Nick’s harness….No, not in the last 7ish years….i just went through my available records to confirm.

    My plan is as follows (for Assembly No: 30091 / Engine: 50367 MGTA)
    1) Check thermostat isn’t sticking
    2) Replace water pump - can you use PN 184038 (575m water pump), or is there additional parts that you have to replace at the same time in order to use the 575m pump?
    3) Get the measurements for a Ron Davis radiator while replacing the pump

    If a new thermostat + 575 pump doesn’t fix it, going to go w the RD radiator but I really don’t want to.
     
  4. Auraraptor

    Auraraptor F1 World Champ
    Lifetime Rossa Owner

    Sep 25, 2002
    13,969
    MO
    Full Name:
    Omar
    I should ask, there is a lower opening thermostat that was used for say the Middle East market or something I could also try?
     
  5. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    28,993
    socal
    No you want the tstat to operate the car at the right temp. I wonder if the recore was done right? I know I don't live in Huston but the aging fleet in general just does not see these problems. The system has just a few pieces and they just are not that hard to diagnose for proper operation.
     
    Auraraptor likes this.
  6. 71veedub

    71veedub Formula Junior

    May 31, 2006
    339
    Boston/North Shore
    Full Name:
    Greg
    Have you replaced the fans?
     
  7. Auraraptor

    Auraraptor F1 World Champ
    Lifetime Rossa Owner

    Sep 25, 2002
    13,969
    MO
    Full Name:
    Omar
    #7 Auraraptor, Aug 19, 2024
    Last edited: Aug 19, 2024
    Yes new Spal 30102113 Puller 16in fan
     
  8. Mirek

    Mirek Formula 3
    Silver Subscribed

    Oct 20, 2019
    1,493
    Los Angeles, CA
    Full Name:
    Mirek
    Sounds like you have all of the usual bases covered. I am having my leaking water pump changed too as we speak. 2003 GTA, Part Number 183760/A WATER PUMP-N



    Image Unavailable, Please Login
     
    Auraraptor likes this.
  9. Auraraptor

    Auraraptor F1 World Champ
    Lifetime Rossa Owner

    Sep 25, 2002
    13,969
    MO
    Full Name:
    Omar
    I gave up trying to sus the correct part number; I just ordered a new pump from AWItalian as they seem to have the best price.

    If that doesnt fix it, at least I will have the measurements to get a RD radiator, but I really don't want to get one if I can avoid it.
     
    71veedub likes this.
  10. 71veedub

    71veedub Formula Junior

    May 31, 2006
    339
    Boston/North Shore
    Full Name:
    Greg
    If you end up deciding to go the new radiator route, you might check with the guys that make the aftermarket 512TR radiators, I had emailed with them a couple years back about the 512TR and asked if they also made a 550 radiator and they said send them mine and they'll add it. Still haven't ordered the 512TR radiators or dealt with the 550, but on both cars I am thinking I will just bite the bullet, replace the fuse board, connectors as needed, radiator(s), and fans. And do Nick's harness on the 550 (already in hand).
     
    Ferrari55whoa likes this.
  11. Impounder

    Impounder Karting

    Aug 6, 2010
    172
    Laguna Niguel, CA
    Not sure if this helps, or even if you are having the same issue, but after a Major Service a number of years ago my car ran hot for a few months and A/C kept blowing a fuse. Dealer took many visits to finally find the problem. In the end it looked like some debris from the radiator hose got stuck in the small pump next to the passeger side front wheel. This is what I posted back than after they fixed it.

    The Water Re-circulation Pump was replaced. All is well, the AC now works again and the engine temp is back to normal. Of course the dealer states that it had nothing to do with the Major Service just a coincidence. Don't care anymore, after 6 weeks I am just happy to have her back. If this happens to anybody in the future it really is just a small pump behind the passenger front wheel. Probably an hour or two to replace. The dealer charged me for 5 probably because of the diagnoses.
     
  12. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    28,993
    socal
    "small pump next to the passeger side front wheel."

    What pump?
     
  13. Aerosurfer

    Aerosurfer Formula 3
    Silver Subscribed

    Nov 21, 2020
    1,884
    Indianapolis
    Full Name:
    Nick
    Auxiliary water pump, circulates thru the heater core at low power settings. On the (LHD) 456 is behind the right wheel panel. Part number 13.
     

    Attached Files:

  14. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    28,993
    socal
    I don't think 550's have that. I have never seen one anyway.

    "heater core at low power settings." That's a new one. I have no clue why such a thing would be needed. The WP should provide all the velocity needed even at idle
     
  15. Aerosurfer

    Aerosurfer Formula 3
    Silver Subscribed

    Nov 21, 2020
    1,884
    Indianapolis
    Full Name:
    Nick
    550s have them too. Perhaps that was a bad text description. But it's an electric pump for heater core circulation. 348s use the same (or nearly so) part. Mine gave out Internally a few years ago so I got intimately familiar with them and the German equivalent parts.
    Image Unavailable, Please Login
     
  16. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    28,993
    socal
    Yeah but that has zero effect on if your car is overheating. That is just bleeding off hot coolant to run heater core. That does not pump coolant to cool fluid like WP pumps water through radiator
     
  17. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
    37,099
    Cowboy Capitol of the World
    Full Name:
    Brian Crall
    I have been told by more than one very good radiator shop they would not recore a 550 radiator because no commercially available core had the cooling capacity of the OE. 550 got away with such a small radiator due to the tube design having a very high surface area to volume ratio.

    Have you tested for the presence of HC in the coolant?
     
    Ferrari55whoa likes this.
  18. Auraraptor

    Auraraptor F1 World Champ
    Lifetime Rossa Owner

    Sep 25, 2002
    13,969
    MO
    Full Name:
    Omar
  19. flash32

    flash32 F1 Veteran

    Aug 22, 2008
    6,921
    Central NJ
    Full Name:
    Dominick
    Hydrocarbons. ..it will show if the head gasket is leaking into coolant passages

    Sent from my moto g power using Tapatalk
     
    Auraraptor and Ferrari55whoa like this.
  20. Auraraptor

    Auraraptor F1 World Champ
    Lifetime Rossa Owner

    Sep 25, 2002
    13,969
    MO
    Full Name:
    Omar
    Makes sense; no we didn’t. I will when we replace the water pump.
     
  21. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    28,993
    socal
    Check the radiator cap too. They are real POS and if don't hold pressure mess with cooling. You can order 3 new ones and maybe 1 will work.
     
    Auraraptor likes this.
  22. Aerosurfer

    Aerosurfer Formula 3
    Silver Subscribed

    Nov 21, 2020
    1,884
    Indianapolis
    Full Name:
    Nick
    You guys have always said this. Short of having a way to pressure test the cap, would not seeing evidence of it overflowing or escaping indicate a good cap? What should it hold pressure to?
     
  23. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    28,993
    socal
    Well if it has the little hose on top then pressure bleeds off there and you never see evidence of it. Sometimes it will bleed water and pressure and you see that in a lower reservoir height. Pressure is in the WSM and or on the cap. WAG It's like 1.3 bar.

    And get a heat gun or temp probe in the coolant to see if the ferrari gauge is close to accurate. I never trust ferrari electronics
     
  24. Aerosurfer

    Aerosurfer Formula 3
    Silver Subscribed

    Nov 21, 2020
    1,884
    Indianapolis
    Full Name:
    Nick
    Oh I do love my heat gun. And shooting the reservoir, main hoses, even the radiator itself has been consistent temps and in comparison to the gauge

    I have never seen any change in reservoir level nor any coolant residue or droplets from the cap outlet or drain tube
     
  25. Auraraptor

    Auraraptor F1 World Champ
    Lifetime Rossa Owner

    Sep 25, 2002
    13,969
    MO
    Full Name:
    Omar
    Me too! I use it on everything ironically not automotive in nature and forget it’s quite useful….
     

Share This Page